1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_COMPILER_ELF_WRITER_H_ 18 #define ART_COMPILER_ELF_WRITER_H_ 19 20 #include <stdint.h> 21 #include <cstddef> 22 #include <string> 23 #include <vector> 24 25 #include "base/array_ref.h" 26 #include "base/macros.h" 27 #include "base/mutex.h" 28 #include "os.h" 29 30 namespace art { 31 32 class ElfFile; 33 class OutputStream; 34 35 namespace debug { 36 struct MethodDebugInfo; 37 } // namespace debug 38 39 class ElfWriter { 40 public: 41 // Looks up information about location of oat file in elf file container. 42 // Used for ImageWriter to perform memory layout. 43 static void GetOatElfInformation(File* file, 44 size_t* oat_loaded_size, 45 size_t* oat_data_offset); 46 47 // Returns runtime oat_data runtime address for an opened ElfFile. 48 static uintptr_t GetOatDataAddress(ElfFile* elf_file); 49 50 static bool Fixup(File* file, uintptr_t oat_data_begin); 51 52 virtual ~ElfWriter() {} 53 54 virtual void Start() = 0; 55 virtual void PrepareDynamicSection(size_t rodata_size, 56 size_t text_size, 57 size_t bss_size, 58 size_t bss_roots_offset) = 0; 59 virtual void PrepareDebugInfo(const ArrayRef<const debug::MethodDebugInfo>& method_infos) = 0; 60 virtual OutputStream* StartRoData() = 0; 61 virtual void EndRoData(OutputStream* rodata) = 0; 62 virtual OutputStream* StartText() = 0; 63 virtual void EndText(OutputStream* text) = 0; 64 virtual void WriteDynamicSection() = 0; 65 virtual void WriteDebugInfo(const ArrayRef<const debug::MethodDebugInfo>& method_infos) = 0; 66 virtual bool End() = 0; 67 68 // Get the ELF writer's stream. This stream can be used for writing data directly 69 // to a section after the section has been finished. When that's done, the user 70 // should Seek() back to the position where the stream was before this operation. 71 virtual OutputStream* GetStream() = 0; 72 73 // Get the size that the loaded ELF file will occupy in memory. 74 virtual size_t GetLoadedSize() = 0; 75 76 protected: 77 ElfWriter() = default; 78 }; 79 80 } // namespace art 81 82 #endif // ART_COMPILER_ELF_WRITER_H_ 83
